When Vicki Wegerle was mysteriously strangled in Wichita, Kan., in 1986, her two young children not only lost their mother, but nearly lost their father, Bill, in the crime's aftermath. Many suspected for 18 years that Bill killed Vicki, but the murderer was really Dennis Rader, aka the BTK killer. The Wegerle family shared their story for the first time with Erin Moriarty.